Finisar FWDM-1629-XX User Manual download pdf (Page 8)

FWDM-1629-XX DWDM SFP Preliminary Product Specification – February 2005 F i n i s a r

 Finisar Corporation PRELIMINARY and Confidential Page 8

Rev C, February 2005

IX. Serial Communication Protocol

All Finisar SFPs support the 2-wire serial communication protocol outlined in the SFP

MSA

. These SFPs use an Atmel AT24C01A 128 byte E

PROM with an address of A0h.

For details on interfacing with the E

PROM, see the Atmel data sheet titled

“AT24C01A/02/04/08/16 2-Wire Serial CMOS E

PROM.”

Finisar’s DWDM SFPs also support extended diagnostic features as described in Finisar

Applications Note AN-2030, “Digital Diagnostic Monitoring Interface for Optical

Transceivers”

. A controller IC that monitors system parameters such as laser current,

module temperature, transmitter power, and received power is accessible at address A2H.

( E

PROM Description TBD pending MSA)

Parameter

Symbol

Min Typ

Max Units Notes/Conditions

C Clock for Atmel

(A0H) and Controller

IC (A2H)

atmel

0 100,000

Hz Bus can be driven blind.

1 2 3 4 5 6 7 8 9 10

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Finisar FWDM-1629-XX User Manual Page 8